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ABSTRACT: Previous study conducted in our department showed that 50% ethanolic extract of the root of Ricinus communis possess reversible antifertility effect and a 62-kDa protein (Rp) from this extract is responsible for the antifertility effects. In this study, we compared the spermicidal effect of this Rp with nonoxynol-9 (N-9) in vitro. The sperm immobilisation studies showed that 100 μg ml(-1) of Rp was able to immobilise the sperms completely within 30 s. Sperm revival test revealed that the spermicidal effect was irreversible. There was also a significant reduction in sperm viability and hypo-osmotic swelling in Rp and N-9 treated groups in comparison with the control. In Rp and N-9 treated groups, the number of acrosome-reacted cells was found to be high and also caused agglutination of the spermatozoa, indicating the loss of intactness of the plasma membrane, which was further supported by the significant reduction in the activity of membrane bound 5'-nucleotidase, acrosomal acrosin. In short, the protein Rp possesses spermicidal activity in vitro and its effects are similar to that of nonoxynol 9.
Andrologia 04/2012; · 1.55 Impact Factor
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ABSTRACT: Sida cordifolia Linn. (Malvaceae) is a plant used in folk medicine for the treatment of the inflammation of oral mucosa, asthmatic bronchitis, nasal congestion and rheumatism. We studied the hepatoprotective activity of 50 % ethanolic extract of S. cordifolia Linn. against alcohol intoxication. The duration of the experiment was 90 d. The substantially elevated levels of toxicity markers such as alanine aminotransferase, aspartate aminotransferase and γ-glutamyl transferase due to the alcohol treatment were significantly lowered in the extract-treated groups. The activity of antioxidant enzymes and glutathione content, which was lowered due to alcohol toxicity, was increased to a near-normal level in the co-administered group. Lipid peroxidation products, protein carbonyls, total collagen and hydroxyproline, which were increased in the alcohol-treated group, were reduced in the co-administered group. The mRNA levels of cytochrome P450 2E1, NF-κB, TNF-α and transforming growth factor-β1 were found to be increased in the alcohol-treated rats, and their expressions were found to be decreased in the co-administered group. These observations were reinforced by histopathological analysis. Thus, the present study clearly indicates that 50 % ethanolic extract of the roots of S. cordifolia Linn. has a potent hepatoprotective action against alcohol-induced toxicity, which was mediated by lowering oxidative stress and by down-regulating the transcription factors.
The British journal of nutrition 01/2012; 108(7):1256-63. · 3.45 Impact Factor
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ABSTRACT: A previous study conducted in our department, showed that 50% ethanolic extract of the roots of Achyranthes aspera possess spermatotoxic effects. Preliminary studies also revealed that the active principle may be a protein. In this study a 58 kDa Achyranthes protein (Ap) was isolated from Achyranthes aspera using standard protocols and their effects on the rat sperm was studied in vitro in comparison with nonoxynol-9 (N-9). The sperm immobilization studies showed that about 150 μg of Ap was able to immobilize sperms completely within seconds at a lower concentration than N-9 (250 μg). The sperm revival test revealed that the spermicidal effect was irreversible. There was also a significant reduction in sperm viability and hypo-osmotic swelling in the Ap-treated and N-9 treated groups in comparison to the control. In the Ap and N-9 treated groups the number of acrosome reacted cells were found to be high and it also caused agglutination of the sperms indicating the loss of intactness of the plasma membrane which was further supported by the significant reduction in the activity of membrane bound 5' nucleotidase and acrosin enzyme. Hence this study showed that the protein isolated from the roots of Achyranthes aspera possess spermicidal activity in vitro and can act as a spermicide similar to that of nonoxynol 9. Ap also possessed spermicidal activity against human sperms in vitro.
Phytomedicine: international journal of phytotherapy and phytopharmacology 02/2011; 18(8-9):776-82. · 2.17 Impact Factor
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ABSTRACT: This study was aimed to evaluate the effect on spermatogenesis of a 62 kDa protein (Rp) isolated from 50% ethanolic extract of the root of Ricinus communis in mice. A dose response study in mice revealed that 25mg/kg body weight/day was the most effective dose. Swiss strain mature male mice of 30 days old were divided into two group namely control and Rp treated (25mg/kg body weight/day). The study showed that sperm motility and count were decreased significantly in the treated group as compared to the control. The fertility index of the treated groups was reduced by 100%. The activity of HMG Co A reductase and cholesterol were increased significantly in the treated group. The testicular activities of 3βHSD, 17βHSD, glucose 6-phosphate dehydrogenase and malic enzyme and the level of serum testosterone were decreased significantly in the treated group. The expression of 3βHSD and 17βHSD were decreased and the expression of StAR increased significantly in the treated group as compared to the control. Proteolytic digestion of the native protein with trypsin and chymotrypsin showed that the proteolytic cleavage did not affect the spermicidal action of Rp. Hence this study can be concluded that Rp impaired spermatogenesis in vivo by suppressing the production of testosterone.
Journal of hazardous materials 01/2011; 187(1-3):386-92. · 4.14 Impact Factor
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ABSTRACT: Earlier studies from one of the investigator's laboratory have demonstrated the presence of a high molecular weight protein (182 kDa) in the blood serum of laboratory animals subjected to pressure-induced cardiac hypertrophy and suggested that this protein may be involved in the development of cardiac hypertrophy. Studies have shown that this protein is also involved in earlier stages of cardiac complications associated with diabetes, but the role of this protein in diabetic heart is less understood. So we aimed to check whether this protein is having any protective role in diabetic heart. The protein was purified from serum of rats induced with cardiac hypertrophy and the purified protein was injected through tail vein of diabetic rats for further studies. The results of various antioxidant enzymes and the TBARS levels have indicated the antioxidant activity of this protein. Real-time PCR analysis of gene expression revealed the upregulation of certain muscle-specific genes like β-MHC, MLC-2, and skeletal α actin in diabetic group and also in presence of 182-kDa protein. The results further showed a down regulation of genes such as cardiac α-actin and α- MHC implicating the role of this protein in the development of cardiac hypertrophy in diabetes. Increased cardiac hypertrophy as revealed by the expression of various genes and improved antioxidant potential in presence of 182 kDa protein in diabetes at the earlier stages is beneficial for counteracting the myocardial damage associated with diabetes.
Molecular and Cellular Biochemistry 12/2010; 350(1-2):229-35. · 2.06 Impact Factor
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ABSTRACT: Sida cordifolia is a plant belonging to the Malvaceae family used in many ayurvedic preparations. This study aimed at assessing the effects of ethanolic extract of Sida cordifolia root on quinolinic acid (QUIN) induced neurotoxicity and to compare its effect with the standard drug deprenyl in rat brain. Rats were divided into six groups: (1) control group (2) QUIN (55 microg/100 g bwt/day) (3) 50% ethanolic plant extract treated group (50 mg/100 g bwt/day) (4) Deprenyl (100 microg/100 g bwt/day) (5) QUIN (55 microg/100 g bwt/day) + 50% ethanolic plant extract treated group (50 mg/100 g bwt/day) (6) QUIN (55 microg/100 g bwt/day) + Deprenyl (100 microg/100 g bwt/day). At the end of the experimental period a status of lipid peroxidation products, protein peroxidation product, activities of the scavenging enzymes and the activities of the inflammatory markers were analyzed. Results revealed that the lipid peroxidation products decreased and the activities of the scavenging enzymes increased significantly in the brain of the plant extract treated group, deprenyl treated group and also in the coadminstered groups. The activities of markers of inflammatory responses such as cyclooxygenase and lipoxygenase were found to be significantly increased in the QUIN treated rats and this was decreased upon the administration of plant extract and deprenyl. In short, the study revealed that 50% ethanolic extract of Sida cordifolia has got potent antioxidant and antiinflammatory activity and the activity is comparable with the standard drug deprenyl.
Neurochemical Research 05/2010; 35(9):1361-7. · 2.24 Impact Factor
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ABSTRACT: One of the mechanisms of neurotoxicity is the induction of oxidative stress. There is hardly any cure for neurotoxicity in modern medicine, whereas many drugs in Ayurveda possess neuroprotective effects; however, there is no scientific validation for these drugs. Ksheerabala is an ayurvedic drug which is used to treat central nervous system disorders, arthritis, and insomnia. The aim of our study was to evaluate the effect of Ksheerabala on quinolinic acid-induced toxicity in rat brain. The optimal dose of Ksheerabala was found from a dose escalation study, wherein it was found that Ksheerabala showed maximum protection against quinolinic acid-induced neurotoxicity at a dose of 15 microL/100 g body weight/day, which was selected for further experiments. Four groups of female albino rats were maintained for 21 days as follows: 1. Control group, 2. Quinolinic acid (55 microg/100 g body weight), 3. Ksheerabala (15 microL/100 g body weight), 4. Ksheerabala (15 microL/100 g body weight) + Quinolinic acid (55 microg/100 g body weight). At the end of the experimental period, levels of lipid peroxidation products, protein carbonyls, and activities of scavenging enzymes were analyzed. The results revealed that quinolinic acid intake caused enhanced lipid and protein peroxidation as evidenced by increased levels of peroxidation products such as malondialdehyde, hydroperoxide, conjugated dienes, and protein carbonyls. On the other hand, the activities of scavenging enzymes such as catalase, superoxide dismutase (SOD), glutathione peroxidase, and glutathione reductase as well as the concentration of glutathione were reduced. On coadminstration of Ksheerabala along with quinolinic acid, the levels of all the biochemical parameters were restored to near-normal levels, indicating the protective effect of the drug. These results were reinforced by histopathological studies.
International journal of Ayurveda research 01/2010; 1(1):4-9.
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ABSTRACT: This study examined the protective effects of quercetin on chronic ethanol-induced liver injury. Rats were treated with ethanol at a dose of 4 g/100 g/day for 90 days. After ethanol intoxication, levels of serum amino transferases were significantly elevated. Decreased activity of superoxide dismutase, catalase, glutathione peroxidase and glutathione reductase was also observed on ethanol administration. Increased amounts of lipid peroxidation products viz. hydroperoxides, conjugated dienes and malodialdehyde were observed on ethanol intoxication. Ethanol administration resulted in significant decrease in liver glutathione content. After 90 days, the control animals were divided into two groups, the control group and the control+quercetin group. Ethanol-treated group was divided into two groups, abstention group and quercetin-supplemented group. After 30 days, the animals were sacrificed and various biochemical parameters were analyzed. The changes in enzyme activities as well as levels of lipid peroxidation products were reversed to a certain extent by quercetin. Quercetin supplementation resulted in increase of glutathione content to a significant level compared to normal abstention group. Quercetin supplemented group showed a faster recovery than abstention group. This shows the protective effect of quercetin against chronic ethanol induced hepatotoxicity. Histopathological study is also in line with these results.
Indian Journal of Pharmaceutical Sciences 09/2009; 71(5):527-32. · 0.63 Impact Factor
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ABSTRACT: The effect of two different doses (1 microg and 50 microg Se/100 g body wt) of selenium on quinolinic acid toxicity was investigated in rat's brain. Male albino rats were maintained for 60 days as follows: (1) control group (normal diet), (2) Quinolinic acid group (55 microg/100 g body wt)/day, (3) high dose selenium (50 microg/100 g body wt)/day, (4) high dose selenium ((50 microg/100 g body wt) + Quinolinic acid (55 microg/100 g body wt)/day (5) low dose selenium (1 microg/100 g body wt)/day and (6) low dose selenium (1 microg/100 g body wt) + Quinolinic acid (55 microg/100 g body wt)/day. Results revealed that quinolinic acid intake lead to an increase in the oxidative stress as evidenced by decreased activity of antioxidant enzymes (SOD, catalase and GR), increased amount of lipid peroxidation products (MDA,HP and CD) and free fatty acids compared to control group. Co administration of selenium at a dose of 1 microg/100 g body wt along with quinolinic acid had reduced the oxidative stress induced by quinolinic acid and it also led to a change in the brain architecture as evidenced by the decreased activity of acetyl cholinesterase and decreased concentration of neurotransmitters. Histopathological studies revealed that selenium at a dose of 1 microg was more effective in reducing the oxidative stress and higher dose of selenium was toxic.
Brain research 06/2009; 1281:101-7. · 2.46 Impact Factor
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ABSTRACT: Diabetes mellitus and alcoholism are two well-known agents causing pathological complications in the body. Both cause oxidative stress and derangements in glucose homeostasis. Advanced glycated end products (AGEs) are formed in hyperglycemia and can cause pathological changes. In this study, we investigated the relationship between AGE-associated fluorescence, in serum, tail tendon collagen, and eye lens with blood glucose and serum malondialdehyde (MDA) in alcohol administered diabetic rats. Blood glucose and glycated hemoglobin (HbA(1)C) decreased in ethanol-administered diabetic rats. Elevated AGE-associated fluorescence in serum, eye lens and tail tendon collagen were observed in alcoholic diabetic rats in spite of the reduced blood glucose levels compared to other groups. AGE-associated fluorescence correlated positively with serum MDA than with blood glucose. Up-regulation of the nuclear translocation of NFkappaB was more profound in the ethanol-administered diabetic group indicating the development of pathological complications. This indicates that the toxicity induced by diabetes has been potentiated in alcohol administered diabetic rats. Our histopathological studies also reinforce our findings. Hence serum AGE-linked fluorescence has the potential to be developed as a surrogate biomarker for oxidative stress.
Experimental and toxicologic pathology: official journal of the Gesellschaft fur Toxikologische Pathologie 05/2009; 62(2):157-62. · 1.43 Impact Factor
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ABSTRACT: The effect of two different doses of selenium [1 and 50 microg selenium/100 g body weight (wt)] on nicotine-induced oxidative damage in liver was investigated in experimental rats. Male albino rats were maintained for 60 days as follows: (1) control group (normal diet), (2) nicotine group (0.6 mg/kg body wt)/day, (3) high-dose selenium (50 microg/100 g body wt)/day, (4) high-dose selenium (50 microg/100 g body wt) + nicotine (0.6 mg/kg body wt)/day, (5) low-dose selenium (1 microg/100 g body wt)/day, and (6) low-dose selenium (1 microg/100 g body wt) + nicotine (0.6 mg/kg body wt)/day. Nicotine administration caused a decrease in the activity of antioxidant enzymes, an increase in the concentration of lipid peroxidation products and protein carbonyls and an increase in the activity of nitric oxide synthase compared to the control group. Coadministration of nicotine and selenium reduced the concentration of lipid peroxidation products and increased the activity of antioxidant enzymes compared to the nicotine group. Selenium also enhanced the metabolism of nicotine. The antioxidant effect was more significant in the group administered a low dose of selenium.
Biological trace element research 03/2009; 130(1):62-71. · 1.92 Impact Factor
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ABSTRACT: Effect of exogenous selenium at a dose of 10 mug/kg body weight on the testicular toxicity induced by nicotine in rats was investigated. Male albino rats were maintained for 60 days as follows: (1) control group (normal diet), (2) nicotine group (0.6 mg /kg body weight), (3) selenium (10 microg/kg body weight), and (4) nicotine (0.6 mg/kg body weight) + selenium (10 microg/ kg body weight). Administration of nicotine caused reduction in sperm count and sperm motility. Activity of HMG CoA reductase and concentration of cholesterol were increased in the testes of the nicotine administered group. Activities of testicular enzymes 3beta hydroxysteroid dehyrogenase (3 betaHSD), 17beta hydroxysteroid dehyrogenase (17 betaHSD) were decreased. Levels of testosterone in the serum were also reduced. However, the extent of these alterations was lesser in the group administered with nicotine along with selenium. Analysis of plasma revealed reduced quantity of cotinine in the group co-administered with nicotine along with selenium in comparison with the nicotine group. Nondetectable levels of nicotine were present in the co-administered group. This indicates altered metabolism of nicotine when administered along with selenium.
Biological Trace Element Research 02/2007; 120(1-3):212-8. · 1.92 Impact Factor
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ABSTRACT: The 50% ethanolic extract of the root bark of C. odorata administered orally at the dose of 1g/kg body weight/day for 60 days resulted in decreased epididymal sperm motility and sperm count in male albino rats. Morphological abnormalities were also observed in the sperms. The testicular glycogen, the activities of 3beta hydroxy steroid dehydrogenase, glucose 6-phosphate dehydrogenase, malic enzyme, sorbitol dehydrogenase in seminal vesicle, fructose in seminal plasma and serum testosterone were significantly decreased in treated group. While testicular cholesterol level, the concentration of the fecal bile acids, urinary excretion of 17 ketosteroids, the activities of 17beta hydroxy steroid dehydrogenase, epididymal lactate dehydrogenase and that of testicular HMG CoA reductase were increased in treated group when compared to control. The results suggest that the ethanolic extract of C. odorata possesses the spermatotoxic effects in male albino rats.
Indian journal of experimental biology 01/2007; 44(12):976-80. · 1.29 Impact Factor
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ABSTRACT: Alcoholics usually suffer from malnutrition and are especially deficient in micronutrients like vitamin C, selenium and Zn. In the present study, combined effects of selenium and ascorbic acid on alcohol-induced hyperlipidemia were studied in guinea pigs. Four groups of male guinea pigs were maintained for 45 days as follows: control (1 mg ascorbate (AA)/100 g body mass/day), ethanol (900 mg ethanol/100 g body mass + 1 mg AA/100 g body mass/day), selenium+ascorbic acid [(25 mg AA + 0.05 mg Se)/100 g body mass/day], ethanol+selenium+ascorbic acid [(25 mg AA + 0.05 mg Se + 900 mg ethanol)/100 g body mass/day]. Co-administration of selenium and ascorbic acid along with alcohol reduced the concentration of all lipids, as also evidenced from the decreased activities of hydroxymethylglutaryl-CoA reductase and enhanced activities of plasma lecithin cholesterol acyl transferase and lipoprotein lipase. Concentrations of bile acids were increased. We conclude that the supplementation of Se and ascorbic acid reduced alcohol induced hyperlipidemia, by decreased synthesis and increased catabolism.
Comparative Biochemistry and Physiology Part C Toxicology & Pharmacology 03/2004; 137(2):109-14. · 2.62 Impact Factor
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ABSTRACT: The effects of co-administration of a cassava rich diet and alcohol in rats were investigated. The animals were divided into four groups (1) Control, (2) Alcohol, (3) Cassava and (4) Alcohol + Cassava. Consumption of alcohol along with cassava reduced the alcohol induced toxicity which was evidenced by the lower activities of GOT, GPT, GGT, acid phosphatase and alkaline phosphatase in the liver and serum of co-administered group. The pyruvate content in the blood increased while the lactate content, lactate/pyruvate ratio and the activity of LDH decreased in the blood due to co-administration. The blood cyanide content, serum thiocyanate content and the activities of rhodanase and beta-glucuronidase increased on co-administration. The histopathological studies also revealed that co-administration reduced the alcohol induced toxicity.
Indian journal of physiology and pharmacology 02/2004; 48(1):41-50.
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ABSTRACT: The effects of feeding a cassava (Manihot esculenta) rich diet on alcohol induced peroxidative damages were investigated in male albino rats. Rats were divided into four groups and maintained for 60 days as follows. (1) Control group: cassava free diet, (2) alcohol group: cassava free diet+ethanol (4 g/kg body wt/day), (3) cassava group: cassava diet and (4) alcohol+cassava group: cassava diet+ethanol (4 g/kg body wt/day). Results revealed that alcohol induced significant lipid peroxidation, since the lipid peroxidation products malondialdehyde (MDA), hydroperoxides and conjugated dienes were elevated in the liver. The activities of free radical scavenging enzymes such as superoxide dismutase (SOD), catalase and glutathione reductase were reduced and glutathione content was decreased in the liver. But the co-administration of a cassava rich diet increased the activity of free radical scavenging enzymes and glutathione content. The level of lipid peroxides in the liver was also decreased on co-administration of cassava. But the oxidative damage caused by cassava was potentiated by alcohol administration. These studies suggested that consumption of alcohol along with cassava offered some protection against the alcohol induced oxidative stress. So we isolated the cyanoglycoside rich fraction from cassava and its impact on rats administered alcohol was also investigated. The results revealed that alcohol induced oxidative stress was potentiated by the co-administration of cyanoglycoside rich fraction. These studies suggested that the fiber and antioxidant vitamins present in the cassava may be playing a protective role against the alcohol induced oxidative stress.
Toxicon 10/2003; 42(4):367-72. · 2.51 Impact Factor
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ABSTRACT: The antifertility effects of 50% ethanol extracts of Ricinus communis have been studied in male rats. There was a drastic reduction in the epididymal sperm counts. Alteration in the motility, mode of movement and morphology of the sperms were observed. Reductions in the fructose and testosterone levels were suggestive of reduced reproductive performance. Reversibility tests showed that the antifertility effect of Ricinus communis was completely reversible on withdrawal of the drug. The ethanol extracts of Ricinus communis did not cause any hepatotoxicity since the hepatic GOT and GPT levels were unaltered.
Phytotherapy Research 06/2003; 17(5):508-11. · 2.09 Impact Factor
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ABSTRACT: Oxidative stress is a key step in the pathogenesis of ethanol associated liver injury. Ethanol administration induces an increase in lipid peroxidation either by enhancing the production of oxygen reactive species or by decreasing the level of endogenous antioxidants. In this present study, four groups of male guinea pigs (Cavia porcellus) were maintained for 45 days as follows: Control group (1 mg ascorbic acid (AA)/100 g body wt./day); Ethanol group (1 mg AA/100 g body wt./day+900 mg ethanol/100 g body wt./day); Selenium+AA group (25 mg AA+0.05 mg sodium selenite/100 g body wt./day); Ethanol+Se+AA group (25 mg AA+0.05 mg sodium selenite/100 g body wt.+900 mg ethanol/100 g body wt./day). Malondialehyde (MDA), hydroperoxides (HP) and conjugated dienes (CD) were significantly increased, while the activities of scavenging enzymes superoxide dismutase (SOD) and catalase were reduced in the alcohol administered groups. Co-administration of Se+AA along with alcohol increased the activities of scavenging enzymes and reduced the lipid peroxidation products level in hepatic tissues of guinea pigs. Activities of glutathione peroxidase (GPX) and glutathione reductase (GR) were enhanced in co-administered group. gamma-Glutamyl transpeptidase (GGT), a marker enzyme of alcohol induced toxicity, was also reduced, as was the glutathione content. This study suggests that the combined effect of Se+AA, provides protection against alcohol-induced oxidative stress as evidenced from the decreased levels of lipid peroxidation products and enhanced activities of scavenging enzymes.
Comparative Biochemistry and Physiology Part C Toxicology & Pharmacology 04/2003; 134(3):397-401. · 2.62 Impact Factor
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ABSTRACT: Feeding 50% ethanolic extract of A. aspera to male rats resulted in reduced sperm counts, weight of epididymis, serum level of testosterone and testicular activity of 3beta-hydroxysteroid dehydrogenase, while motility of the sperm and activity of the HMG CoA reductase were not affected. Cholesterol level in the testis, incorporation of labelled acetate into cholesterol, 17-ketosteroids in urine and hepatic and fecal bile acids were increased. The results suggest that ethanolic extract of A. aspera caused reproductive toxicity in male rats and the action may be by suppressing the synthesis of androgen.
Indian journal of experimental biology 12/2002; 40(11):1307-9. · 1.29 Impact Factor
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ABSTRACT: Effects of exposure of an alcoholic beverage (arrack and its equivalent quantity of alcohol throughout pregnancy and lactation on brain lipids were investigated. Female rats were exposed to arrack (12.00 ml/kg body weigh/day) and ethanol (4.00 g/kg body weight day) before conception and throughout gestation and lactation. For 21 days pups were nursed by their own mothers, afterwards they were fed normal laboratory feed. We found that the level of cholesterol, phospholipids, triacylglycerols, free fatty acids, cerebrosides, ceramide dihexosides, ceramide polyhexosides, sulfatids,, mono and diglycosyl diglycerides and gangliosides were increased in the brain of 21st and 45th day pups. The alterations in the glycolipid profile of the brain persisted even when pups were not directly exposed to alcohol. These alterations in the glycolipid and ganglioside metabolism may be associated with the developmental abnormalities of the brain seen in FAS. The elevation produced in the glycolipid profile of arrack administered pups were more than that caused by its equivalent quantity of ethanol. This suggested an interaction of congeners in the arrack with the alcohol.
Indian journal of physiology and pharmacology 11/2001; 45(4):421-7.
